Lub tshuab hluav taws xob digital ntsuas qhov twg lub qhov hluav taws xob lub qhov hluav taws xob yog cov hlau nyob li cas?
Yog tias nws yog DC, nws yooj yim heev. Tsuas yog ntsaws ob qhov kev xeem coj ncaj qha mus rau ob qho kawg ntawm lub hwj chim mov. Yog tias qhov pom qhov hluav taws xob tau zoo, qhov kev kuaj liab liab yog tus ncej zoo. Yog tias qhov pom qhov hluav taws xob tsis zoo, qhov kev ntsuam xyuas dub yog tus ncej zoo.
Vim hais tias alternating tam sim no tsis muaj qhov zoo thiab tsis zoo ncej, txoj kev no tsis siv rau alternating tam sim no.
Yog li, yuav ua li cas peb siv lub multimeter kom paub qhov txawv ntawm qhov nyob thiab nruab nrab ntawm AC fais fab?
Thawj txoj kev: Tam sim no kho lub multimeter mus rau AC ntau yam (yog tias nws tau muab faib, kho nws mus rau qhov ntau dua 220VAC), thiab txuas cov kev ntsuam xyuas dub ncaj qha rau hauv av (koj tuaj yeem txuas rau lub qhov nyob hauv nruab nrab ntawm lub qhov (socket) peb-theem, yog tias tsis yog, koj tuaj yeem txuas ncaj qha mus rau hauv av lossis phab ntsa), kev kuaj liab ua rau txuas nrog cov hlau nruab nrab thiab cov hlau nyob hauv qhov sib txuas. Tus lej loj dua yog cov hlau nyob.
Qhov thib ob txoj kev: Tam sim no kho lub multimeter mus rau AC teeb tsa, tawm hauv qhov kev sim dub coj ncaj qha mus rau qhov tsis ua haujlwm, thiab txuas cov kev sim liab coj mus rau qhov nruab nrab ntawm cov hlau tsis muaj hlau thiab lub qhov hluav taws xob nyob ntawm qhov sib txuas. Tus lej loj dua yog cov hlau nyob. Qhov voltage ntsuas los ntawm txoj kev no tsis yog qhov tseeb AC voltage, tab sis nws muaj peev xwm paub qhov txawv ntawm cov kab nruab nrab thiab kab nyob.
Tau kawg, yog tias koj nrhiav tsis tau qhov chaw sib cuag ntawm cov hlau tsis huv lossis cov hlau nyob, koj tsis tas yuav tev tawm cov txheej rwb thaiv tsev ntawm cov hlau. Ib qho kev xeem cov hlau lead yog hauv av, thiab lwm qhov kev sim cov hlau lead yog ncaj qha ze rau cov txheej rwb thaiv tsev ntawm cov hlau. Qhov kev nyeem ntawv loj dua yog cov xov hlau nyob, thiab qhov kev nyeem me me yog cov kab xoom.
Yuav ua li cas siv ib tug multimeter los txiav txim lub cev muaj zog ceev
Ordinary peb-theem squirrel tawb motors muaj ob qhov ceev: ib qho yog synchronous ceev N1. Lub thiaj li hu ua synchronous ceev yog qhov ceev ntawm lub cev muaj zog rotating magnetic teb. Qhov ceev no muaj kev sib raug zoo nrog tus naj npawb ntawm cov hlau nplaum ncej ntawm lub cev muaj zog, uas yog, n1 - synchronous ceev, kev sib hloov ceev. /point;
J-- zaus tam sim no, cycles/second;
P--Tus naj npawb ntawm cov sib nqus ncej ntawm lub cev muaj zog.
Qhov thib ob yog lub asynchronous ceev, uas yog qhov ceev ntawm lub cev muaj zog ncej. Thaum lub tshuab hluav taws xob tsav cov tshuab tsim khoom, qhov ceev ntawm lub cev muaj zog yog
Qhov kev sib hloov ceev ntawm rotating magnetic teb yog me ntsis qis, tab sis qhov sib txawv yuav luag tib yam. Piv txwv li, rau ib khub ntawm cov hlau nplaum lub cev muaj zog, qhov ceev ntawm lub cev muaj zog yog 2950 rpm, rau ob-ncej lub cev muaj zog, nws yog 1430 rpm, thiab rau peb-ncej lub cev muaj zog, nws yog 920 rpm. Raws li lub hauv paus ntsiab lus saum toj no, ib tug multimeter tuaj yeem siv los txiav txim seb tus naj npawb ntawm cov hlau nplaum ntawm lub cev muaj zog, thiab tom qab ntawd txiav txim siab qhov ceev ntawm lub cev muaj zog;
